Hollow panel



HOLLOW PANEL Filed Dec. 24, 1935 I ATTORNEY Patented Aug. 29, 1939 2,171,358 HOLLOW PANEL Jean Le Gall, Nanterre, France, assignor, by mesne assignments, to American Reno, Inc., Montclair, N. J., a. corporation of New Jersey Application December 24, 1935, Serial No. 55,990 In France December 28, 1934 2' Claims.

The invention herein disclosed relates to a hollow panel of the type disclosed in Letters Patent No. 1,887,814 issued to me on November 15, 1932. v

In my aforementioned patent, I disclose a hollow panel construction which comprises interlocked spaced strips forming a multi-cellular construction between the sides of the panel. This core reinforces the hollow panel and is made up of several series of parallel strips. The strips Fig. 1 is a perspective view of a panel constructed in accordance with this invention and having parts broken away to show the interior construction thereof;

Fig. 2 is a perspective of a portion of one type of strip;

Fig. 3 is a similar view of a section of another strip; and

Fig. 4.is a perspective of two interlocked angularly disposed strips.

of one series extend angularlv with respect ,to-... As seen in Figure 1, when the hollow panel s another series and are intern'aked by notches formed in the edges of the ens-sing strips. In one specific form, there is a series of parallel 16 strips having notches along both edges thereof, the notches along one edgebeing intermediate the notches along the other edge. Another series of strips have notches along one edge to engage with one set of notches on the first mentioned 0 series, and another series of strips to engage with the notches on the opposite edge of the first series of strips.

An object of the present invention is to improve the internal structure of hollow panels of 5 this type so as to facilitate the assembly thereof and the placing of all the strips together so as to obtain an unbroken edge on both sides and consequently a balance of the outside surfaces of the panel.

In accordance with the invention there are but two series of strips between the sheets forming the outside of the panel. In one specific embodiment, the strips of one series of parallel strips have spaced pairs of notches in the edges thereof, each pair of notches including a notch on the opposite edge of the strip the two notches lying in the same plane. The other series of parallel strips which effect an interlocking engagement with the first mentioned series has strips that are made of two sections, each section being half the width of the strips of the first mentioned series of strips. The sections of these latter strips have notches in the edges thereof equal in depth to half the width between a pair of notches in a strip of the first mentioned series of strips. Thus when one section of these strips is inserted in one of a pair of notches in a strip of the other series, and the other sectionis inserted in the other notch of the pair, the two strips form an unbroken line at each edge where the strips cross thereby providing an absolute balance of the sheets making up the sides of thepanel construction.

Such an embodiment of the invention is dis- 5;; closed in the accompanying drawing in which:

made up of boards the sides of the panel consists of two flat boards I and 2 separated by a multi-cellular construction and end pieces 3 the latter forming the ends of the completed panel.

The multi-cellular interior construction is made up of a series of spaced parallel strips 4 extending perpendicularly to the surfaces of the sides I and 2, and another series of spaced parallel strips 5 likewise extending perpendicularly to the sides I and 2 and disposed angularly with respect to the strips 4. The strips 4 and 5 interlock in a manner hereinafter explained so that their edges form an unbroken line and the edges of each pair of strips abut against both'the in-- terior surfaces of the sides i and ii.

One of the strips 4 is illustrated in Figure 2. As seen in Figure 2, this strip has a series of pairs of notches 4a and 4b. The several pairs of notches are spaced apart and each pair consists of a notch in the opposite edges of the strip and the two notches of a pair lie in the same trans.- verse plane of the strip.

One of the strips 5 is illustrated in Figure 3. As seen in Figure 3, a strip 5 is made up of two symmetrical sections 5a and 5b. The section 5a includes a series of spaced notches 5c and in one edge thereof, and the section 51) includes a series of notches 5d in an edge thereof. The depth of the notches 5c and 5d is equal to one-half of the width of a strip 4 between the inner ends of a pair of notches. Thus when the sections 5a and 5b are brought together so that notches 5d and 5c coincide, there is formed a series of openings having a length equal to the width of a strip 4 between the ends of a pair of notches 4a, and 4b.

The strips 4 and 5 are assembled as illustrated in Figure 4. The strips 4 in a series of strips are arranged parallel and spaced apart a distance equal to the distance between the slots 50 in the section 511 of the strip 5 or the hatches id in the section 51), the distance between successive notches 5c and 5d being the same. A section 5a is laid in the notches la. of the strip 4, with a notch 50 coinciding with notch la, and the section 52) is laid in the notch 4b with a notch Ed in alignment with the notch lb. The inner ends of the sections 5a and 5b thus come together as shown in Figure 4 and the edges of the strips 4 and 5 lie in the same plane and the strip 5 fills the notch in the strip 4 so that the edges of the strips when assembled form unbroken lines and a balanced support for the side of the panel.

It will be obvious that various changes may be made by those skilled in the art in the details of the embodiment of the invention illustrated in the drawing and described above within the principle and scope of the invention as expressed in the appended claims.

I claim:

1. A hollow panel construction comprising two flat spaced boards constituting the side parallel opposed side members, and two angularly disposed series of strips arranged edgewise with respect to the side members, the strips all being of uniform width and abutting against the inner faces of the side members, the strips of one series having pairs of notches at spaced intervals cut into the opposed edges of the strips, and the strips of the other series being each composed of two transversely longitudinally separable half sections with similarly spaced slots cut in the inner edges of the two halves, the strips being assembled by interfitting the notches 'of one half section of each of the second mentioned series of strips with the notches on one edge of the first mentioned series of strios and by interfltting the notches of the other half section of each of the second mentioned series of strips with the notches on the other edge 01' the first mentioned series of strips.

2. A hollow panel construction comprising two flat spaced boards constituting the side parallel opposed side members,and two angularlydisposed series of strips arranged edgewise with respect to the side members, the strips all being of uniform width and abutting against the inner faces of the side members, the strips of one series having pairs of notches at spaced intervals cut into the opposed edges of the strips for a depth equal to one quarter of the width of the strip, and the strips of the other series being each composed of two transversely longitudinally separable hall sections with similarly spaced slots cut in the inner edges of the two halves for a depth equal to one half of the width of the half section, the strips being assembled by interfltting the notches of one half section ofeach of the second mentioned series of strips with the notches on one edge of the first mentioned series of strips and by interfitting the notches of the other half section of each of the second mentioned series of strips with the notcheson the other edge of the first mentioned series of strips.

JEAN LE GALL. 

